This chapter contains preventive maintenance, troubleshooting, and repair instructions for the radio set. Preventive maintenance includes periodic checks and services and cleaning. But there are no hard jumpers between the two batteries.
The radio can be operated with a single battery but that will result in reduced output power and shorter talk time. The radio can use any of the BA family of batteries. Maintain mobile communications with your antenna tied down. Ensure that the protective antenna tip cap is on the end of your antenna.
DO NOT touch or stand within 30 inches 0. Toggle navigation Fbscan. Home Extension Pricing Policy About-us. Note the receive path gain blue is flat in the pass-band and is around -3 dB The Tx gain green should be in the 10 to 20 dB area, but is near zero. It looks like the harmonic filters are working fine but either the A9 Antenna Coupler or RF amp has a problem. Next to repeat these tests with the coupler disabled.
The Rx preamp is bypassed in both the following tests. The harmonic filters are working fine. That requires supplying power with current monitoring. A couple of BA battery adapters two to support the radio , but with a bench power supply instead of batteries. When this battery fails the radio will not remember setup information so it will need to be entered every power up. Also see the A01A1 Interface Board below.
It's been suggested that my antenna may be a poor match and that caused this problem. That's very important for a radio that covers 1. The radio showed Tune Faults when initially trying to use it and after replacing the dead memory battery it started to tune.
In the process of replacing the memory battery the first time the radio had been opened up a couple of screws that hold the chassis to the front panel were seen to be missing.
They were later found on the carpet and replaced. At no time did I hear them rattling around. After replacing the memory battery that antenna coupler started working, see Operation above.
Note the two screws are adjacent to the antenna coupler circuitry. This doesn't help much in troubleshooting, but does shed some light on what went wrong. To remove the A9 Antenna Coupler: 1. Remove the brass screw holding the antenna connection terminal.
Remove the ribbon cable and SSMB coax connection on the bottom of the chassis. Loosen the 4 captive screws holding the A9 board and remove. The A5 board has an SSMBf coax cable hard wired that goes to a male-male connector mounted to the chassis. The other side of this connector is a loose female-female cable that goes to the A8 RF Power Amp. The DATA connector has pins for two different functions. A Y cable could be made to allow both of these functions to be done at the same time.
CAGE Because of the way the cable is made nothing connected to DB-9 pins 1, 4, 6, 7, 8 or 9 there is no hardware flow control. There are a couple of ways of getting into DOS.
In both these cases you need a real serial COM port. The use of a USB to Serial adapter is problematical. Frequency Hopping. The TCI is a log type antenna pointing up, would be excellent for ALE since I live in a canyon in the mountains about 1, ft elevation. Wish list of antennas: TCI takes a ' square or antenna takes an 85' square please let me know. More tomorrow after it's collected some data. Remote Control can use RF remote. EXE and other files.
Let me know if you have a copy. This is the mode to erase all the programming. It feels like there's a stop preventing the switch from going to the ZERO position. The knob must be pulled out to clear the stop that prevents accidental zeroing. The "NO" is flashing. Pressing the up or down arrow changes it to YES. These keys are used to move between menu items.
In a similar manner you need to use the right arrow key to see all of a message that's too long to fit on the screen. When a menu item is blinking if you press Up or Down the item will change values.
NOTE: This is not intuitive so do try up and down on blinking items to see what happens. Call only works when the mode switch is at ALE. For example to enter a message containing CA for California the A and C letters are both on the 1 key so after getting C displayed you need to press some other key to "set" the C, say you press 9.
The function of the option key depends on the mode switch position. The top level choices are shown below. The function of the program key depends on the mode switch position.
To change the date a remote terminal is needed. When channels are programmed they do not survive power off so the memory battery probably needs to be replaced.
Sens dB m. By selecting one of the programmed channels, pressing PTT and making a lot of noise into the mike with no mike input there is no RF output for SSB modulation, and only a small amount of output for AME. But, in any case, there were tune faults using the matched load, so this confirms that there's a problem with the radio. A8 complete assembly The A2 top board has the harmonic filters and their relays.
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